Thank you very much Sabbatical.
The booklet for the V&A museum 1954 exhibition says another side to Queen Mary (apart from her collecting) was her patronage of the arts and her interest in every important loan exhibition during her life.
So I think these items in my posting above and in Pablo's were from Queen Mary's own collection(s) and which she lent to the 1954 exhibition.
I truly think the pieces were returned to her afterwards !!
From the booklet, there is a pic below here of a fan - which I was not able to find in the e-Gallery, Textiles & Fans, of the Royal Collection.
[ The Royal Collection belongs to the Sovereign (currently Queen Elizabeth II ) and is held in trust for her heirs and successors and the Nation. ]
So just how many of Queen Mary's various private collections are now in the Royal Collection we just do not know.
But many individual pieces are there, of course, and are identified as from her collection(s).
I did find this fan in the Royal Collection -
http://www.royalcollection.org.uk/eGall ... tail=about
From the exhibition booklet -